Transition Metal-Free Aromatic C-H, C-N, C-S and C-O Borylation

Aromatic organoboron compounds are highly valuable building blocks in organic chemistry. They were mainly synthesized through aromatic C-H and C-Het borylation, in which transition metal-catalysis dominate. In the past decade, with increasing attention to sustainable chemistry, numerous transition metal-free C-H and C-Het borylation transformations have been developed and emerged as efficient methods towards the synthesis of aromatic organoboron compounds. This account mainly focuses on recent advances in transition metal-free aromatic C-H, C-N, C-S, and C-O borylation transformations and provides insights to where further developments are required.

Automated summary

Aromatic organoboron compounds, valuable in organic chemistry, have traditionally been synthesized through transition metal-catalyzed aromatic C-H and C-Het borylation. However, with the focus shifting toward sustainable chemistry, transition metal-free C-H and C-Het borylation transformations have emerged as efficient methods. This account highlights recent advances in transition metal-free transformations and discusses areas for further development.